before you spend your money do some research on
caraudio.com
diymobileaudio.com
just troll the forum and soon you will get an idea of what kind of build quality and SQ you can get for that same money. In general when it comes to car audio I would never use anything that can be purchased at a retail chain like Best Buy or Circuit City, not out of snobbery, just the knowledge that audiophile components to a system are usually cheaper for what you get.
Right now I am planning a major install into my wifes Fit, right now heres what I got :
CDT ES/HD 300 crossovers (no power regulation on these)
woofer : CDT M6+ 6.5" midbass/sub
mid: Hybrid Audio Legatia 3's ( will make a custom pod in the triangular useless front mini window for this and the tweeter )
Tweeter : CDT DRT 25
Then i also have the CDT upstage kit with extra tweet for imaging that ill put in the stock location on "low"
Rear doors :
CDT hd M6 woofer (not M6+)
Some 4 inch of some kind, maybe a coaxial. The Phoenix gold RSD series is a secret right now in how good it is and you can them for dirt cheap
Subs:
I have 3 different sets of woofers to try out, 2 Digital Designs 1008, or Image Dynamics ID8's or Ascendant Audio Asaasin 10's.
I plan on glassing pods into the sides of the trunk area since i promised my wife I wouldn't take any of her grocery space
i bought all the CDT stuff practically new on ebay for $400 shipped
subs on the audio forums for $130 a set
amps are older Phoenix Gold Tantrums, 1200.1 and 600.4, forums, $300
total $830 for parts at least since you my customizing with make this alot more but thats my own obsession and most guys can fair without it.